[GRASS5] Re: r.sun parameter descriptions

[Jaro Hofierka]

There was a discussion on this a couple of years ago between me, Markus 
and Marcel Suri. The reason for this is that the SOLPOS algorithm is 
already implemented in r.sunmask. So, implementing SOLPOS in r.sun would 
eliminate a need for r.sunmask or unify solar algorithms used in both 
modules. So far, I haven't done any tests and comparisons between 
r.sunmask and r.sun regarding computed sun parameters. The differences 
should be small, but it depends on application and accuracy 
requirements. There are many approximation formulas that are all 
correct. Maybe Markus can help on this too.

Jaro

Hamish wrote:

>>>Anyone have plans or thoughts about migrating to the SOLPOS
>>>algorithm? What sort of improvement would this bring? i.e. is the
>>>difference large enough to matter in a practical sense or is it more
>>>an academic matter of making the model as correct as it can be? 
>>
>>As far as I know nobody is working on this.
> 
> 
> 
> What I was getting at was: is this was worth me spending time on or not
> in the future? How much would it improve the model? Would the effort
> make any real difference to the answer or is it negligible?
> 
> 
> Hamish
>